Search: Herschel, John in correspondent 
Hamilton, William Rowan in correspondent 
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John Herschel Project in contributor 
1840-1849::1847::10 in date 
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From:
William Rowan Hamilton
To:
Sir John Herschel
Date:
[2 October 1847]
Source of text:
unknown
Summary:

The equatorial on the Dublin Observatory dome needs improvement. In the last fifty-two months, WH has seen three new planets: Neptune, Iris, and Flora.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
William Rowan Hamilton
Date:
[6 October 1847]
Source of text:
TCD 1493:411
Summary:

Thanks WH for 'plan' of [asteroid] Iris. Family is happy to have WH's son (JH's son William's friend) with them for holidays. Recounts their playful and adventurous activities.

Contributor:
John Herschel Project
From:
William Rowan Hamilton
To:
Sir John Herschel
Date:
[23 October 1847]
Source of text:
unknown
Summary:

WH notes that quaternions derive some interesting results in problems with three moving bodies.

Contributor:
John Herschel Project
From:
William Rowan Hamilton
To:
Sir John Herschel
Date:
[30 October 1847]
Source of text:
unknown
Summary:

Describes the funeral of James MacCullagh; mystified why he committed suicide.

Contributor:
John Herschel Project